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What is Operating System ? What is Kernel ? What is Linux?

Lot of people get scared when they here they have to work on Linux, You don't have to. To drive a Car you do not have to know how eng...

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Important linux commands used in real time scenarios..

This is a linux command line reference for common operations. Examples marked with • are valid/safe to paste without modification into a te...
What is port map why is it required ?

What is port map why is it required ? Linux uses a combination of kernel-level support and continuously running daemon processes to ...
Linux Interview Questions For software QA Engineers

Software testing - Questions and Answers - Linix / Unix 1. Q. How do you list files in a directory? A. ls - list directory contents l...
What is Operating System ? What is Kernel ? What is Linux?

Lot of people get scared when they here they have to work on Linux, You don't have to. To drive a Car you do not have to know how eng...
what is the difference between RHEL4 & RHEL5?

what is the difference between RHEL4 & RHEL5? RHEL4 :No yum server,Selinux,secure,no cd key ...
What is the difference between Swapping and Paging?

Swapping occurs when whole process is transferred to disk,while paging is when some part of process is transferred to disk while rest is sti...
Introduction to System Calls (I/O System Calls)

System Calls for I/O The way that programs talk to the operating system is via ``system calls.'' -- it is a request to the operating...
What is the difference between processes and threads?

The memory space, where a given application is executed is called - process. A Process is the memory set aside for an application to be exe...
Using ethtool

The ethtool command is slated to be the replacement for mii-tool in the near future and tends to be supported by newer NIC cards. The comman...
What is initrd why is it required ?

The kernel almost certainly will have been passed an initial RAM disk image (usually called "initrd") by the boot loader. This ...

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